The original motivation for the study of quantum information came from the discovery that the
laws of quantum mechanics enable us to perform important and otherwise intractable information-
processing tasks. Much of the theoretical work in this field for the past two decades has focused
on placing Quantum Information Theory on a solid mathematical and physical foundation. This
has not only yielded rich dividends for the foundations of quantum theory, but has also provided
insights into questions in quantum optics, condensed matter physics, and more recently, black-hole
physics.

My current research interests fall into three broad categories:
(i) Studying decoherence in physical systems and evolving schemes to tackle such decoherence
efficiently via Quantum error correction
(ii) Understanding the interplay between uncertainty and complementarity, with implications for
quantum cryptography and quantum foundations.
(iii) Quantum information as a tool to explore fundamental questions in other areas of theoretical physics.